An electronic device is provided. The electronic device includes a housing; a first antenna for transmitting and receiving at least one of a first wireless transmission signal and a first wireless reception signal using the first portion of the housing; a first PCB electrically connected to the first antenna and including a first connector; a second PCB electrically connected to the first PCB and including a second connector; a signal connection member having a first end connected to the first connector and a second end connected to the second connector; a communication module electrically connected to the second connector and controlling the at least one of the first wireless transmission signal and the first wireless reception signal; a sensor module which is electrically connected to the second connector, and adjusts at least one sensing parameter based on frequency information of the at least one of the first wireless transmission signal and the first wireless reception signal, and measures capacitance for a path of the at least one of the first wireless transmission signal and the first wireless reception signal between the first antenna and the second connector; and a processor configured to control the transmission power of the communication module according to the capacitance measured by using the sensor module.